"Yule-Simon distribution" meaning in English

{
  "etymology_text": "Named after Udny Yule and Herbert A. Simon. Simon originally called it the Yule distribution.",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "Yule-Simon distribution",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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        {
          "kind": "topical",
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          "name": "Statistics",
          "orig": "en:Statistics",
          "parents": [
            "Formal sciences",
            "Mathematics",
            "Sciences",
            "All topics",
            "Fundamental"
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      ],
      "glosses": [
        "A certain discrete probability distribution."
      ],
      "id": "en-Yule-Simon_distribution-en-noun-K9fMtcZL",
      "links": [
        [
          "statistics",
          "statistics"
        ],
        [
          "discrete",
          "discrete"
        ],
        [
          "probability",
          "probability"
        ]
      ],
      "raw_glosses": [
        "(statistics) A certain discrete probability distribution."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "statistics"
      ],
      "wikipedia": [
        "Yule-Simon distribution"
      ]
    }
  ],
  "word": "Yule-Simon distribution"
}

{
  "etymology_text": "Named after Udny Yule and Herbert A. Simon. Simon originally called it the Yule distribution.",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "Yule-Simon distribution",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms with non-redundant non-automated sortkeys",
        "en:Statistics"
      ],
      "glosses": [
        "A certain discrete probability distribution."
      ],
      "links": [
        [
          "statistics",
          "statistics"
        ],
        [
          "discrete",
          "discrete"
        ],
        [
          "probability",
          "probability"
        ]
      ],
      "raw_glosses": [
        "(statistics) A certain discrete probability distribution."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "statistics"
      ],
      "wikipedia": [
        "Yule-Simon distribution"
      ]
    }
  ],
  "word": "Yule-Simon distribution"
}